<template>
    <div class="list" ref="wrapper">
        <div >
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.city}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import {mapState, mapMutations} from 'vuex'
import BetterScroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState(['city'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new BetterScroll(this.$refs.wrapper)
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('./')
    },
    ...mapMutations(['changeCity'])
  }
}
</script>

<style lang='stylus' scoped>
@import '~styles/varibles.styl'
.border-topbottom{
    &:before{
        border-color:#ccc
    }
    &:after{
        border-color:#ccc
    }
}
.border-bottom{
    &:before{
        border-color:#ccc
    }
}
.list{
    overflow:hidden;
    position:absolute;
    top:1.58rem;
    left:0;
    right:0;
    bottom:0;
    .title{
        line-height :.54rem;
        background :#eee;
        color:#666;
        font-size:.26rem;
        padding-left:.2rem;
    }
    .button-list{
        padding:.1rem .6rem .1rem .1rem;
        overflow :hidden;
        .button-wrapper{
            float:left;
            width:33.33%;
            .button{
                text-align :center;
                padding:.1rem 0;
                margin:.1rem;
                border:.02rem solid #ccc;
                border-radius:.06rem;
            }
        }
    }
    .item-list{
        .item{
            line-height:.76rem;
            padding-left:.2rem;
        }
    }
}
</style>
